Stihl 1125 (034/036) Oil Pump Oddity

[drf256]

I’m fixing up an 034 for a buddy and I have now found a 3rd rendition of the oil pump for the model. I wanted him to have a side adjust case and knew I had an extra 036 case lying around.

The usual oil pump is the 1/4 turn cam adjust type we all know.

The last oddity I’ve seen until now was an old 034S pump with a slotted screw to adjust which made multiple revolutions and bottomed out on the case. Seemed to be the highest output pump.

I found this unfortunately yesterday. A pump with no adjustment on a case without an adjustment hole. I have to grind a slot in the case to actually fit the adjustable pump on it as well as bring the rail to access the screw. The case lacked the extra webbing around the adjust hole as well. Seem like it should hold up.

Very odd indeed. Figured I’d share.

 

[Wonkydonkey]

I know the non pro 026 models had a non adjustable oiler. So is this an early non pro 034 ?

I wonder how old the case is. It must be an very early version ?

have you checked the serial * for the approx yr of manufacture
have a check on this site
https://workshoppist.com/decoding-stihl-chainsaw-serial-and-part-numbers/

 

[drf256]

I haven’t checked the SN. I can post it in a bit.

I thought about an early case also, but any 034 early cases I’ve seen are front adjust. The late standard 034 and the 034Super were side adjust. All 036 are side adjust.

I know there was an economy model of the saw (036) with a plastic clutch cover, this must be one of those cases.

 

[drf256]

Here is the 48mm jug that’s being added.

The uppers look sloppy, but that’s because they are canted 7* from side to side and have 2 different entry angles from the roofs.

 

[Hundred Acre Wood]

I haven’t checked the SN. I can post it in a bit.

I thought about an early case also, but any 034 early cases I’ve seen are front adjust. The late standard 034 and the 034Super were side adjust. All 036 are side adjust.

I know there was an economy model of the saw (036) with a plastic clutch cover, this must be one of those cases.

My 034 is front adjust and it came with a plastic clutch cover when I bought it new. Still have it.

 

[Sawyer94]

Here is the 48mm jug that’s being added.

The uppers look sloppy, but that’s because they are canted 7* from side to side and have 2 different entry angles from the roofs.

View attachment 361404 View attachment 361405 View attachment 361406 View attachment 361407 View attachment 361408

Looks great! Reminds me, I got an 034 I need to get around to fixing.


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